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September 10, 2025PlantsOpen Access

Effects of Subsurface Drip Irrigation Depth on Growth Characteristics and Yield Quality of Apples (Malus pumila Mill.) in Northwest China

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Irrigation at 30 cm depth significantly increased leaf nitrogen, phosphorus, and potassium contents.
Compared to surface irrigation, irrigation at 30 cm enhanced apple yield and quality metrics.
Soil hypoxia was primarily a concern at greater depths, impacting plant water potential adversely.
Principal component analysis confirmed that 30 cm depth favored optimal growth conditions and fruit quality.

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Observational analysis found optimal irrigation depth of 30 cm improved apple growth and fruit quality, suggesting better fertilization strategies.

Zheng et al. (2025) studied this question.

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Observational analysis found optimal irrigation depth of 30 cm improved apple growth and fruit quality, suggesting better fertilization strategies.